Putting a chip in a 9650sts to make it run with a 9750sts sounds great,but if you want a combine to last over 150hrs DON'T DO IT We were going to do the same thing to our combines before I found out that the 8.1 engines ARE different!!!!Trust me!!!I know alot of harvesters.They build pistion rings and pistons different,I don't know the complete facts but when a harvester has 6 9650sts's and 3 of them blew up before they figured out the chips did it..Second reason we didn't buy 96's was I would have to order everything heavy duty,Reverser size and belt,cylinders,gearcase clutch pack,air filter,reverser cooler and resale value..Then if you add it all together it's not much different in price,and we do need the horse power (16row 30"corn head's article in Farm Show Magazine)and 36ft draper's.